Auto merge of #23135 - maharsh312:master, r=jdm

Create CanvasRect for OffscreenCanvas

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Created CanvasRect fot OffscreenCanvas and Updated Testcases

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components/canvas_traits/canvas.rs

@@ -23,7 +23,7 @@ pub enum CanvasMsg {
     Canvas2d(Canvas2dMsg, CanvasId),
     Create(
         IpcSender<CanvasId>,
-        Size2D<u32>,
+        Size2D<u64>,
         webrender_api::RenderApiSender,
         bool,
     ),